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beverly_spencer2026-04-18

I've been using Novolog for a while now, but my doctor suggested switching to Fiasp Penfill 100unit/ml. I've heard it works even faster, but I'm curious about any side effects or experiences others have had with it. How does it compare to other fast-acting insulins like Novolog or Humalog? Are there any significant differences in how it controls blood sugar levels or any notable side effects? Any insights or tips would be greatly appreciated!

1 min read
last active 4/18/2026
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Comments (5)

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lori_allen4/14/2026

I've used both Fiasp and Novolog, and while Fiasp is definitely faster, I've had more issues with injection site reactions. It's important to rotate injection sites frequently.

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philip_knight4/14/2026

I've been on Fiasp for a while and haven't had any major issues. I did experience some muscle cramps at first, but they went away after a few weeks. Overall, I think it's a great option for managing blood sugar levels.

J
joyce_murray4/14/2026

I've noticed that Fiasp works even faster than Humalog. It definitely helps with post-meal spikes, but I've had to be very careful with dosing.

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ronald_pierce4/14/2026

I've heard it can also help with post-meal spikes better than other insulins. Has anyone else noticed this?

R
ralph_andrews4/14/2026

I switched to Fiasp because my doctor thought it would help me manage my blood sugar better. I've definitely noticed a difference, but I had to be really careful with dosing. It's a bit of a learning curve, but worth it for the better control.